234*12.1+235*42.2-135*54.3
题目
234*12.1+235*42.2-135*54.3
235*12.1+235*42.2-135*54.3
答案
234*12.1+235*42.2-135*54.3
=(235-1)*12.1+235*42.2-135*54.3
=235*12.1-12.1+235*42.2-135*54.3
=(235*12.1+235*42.2)-135*54.3-12.1
=235*(12.1+42.2)-135*54.3-12.1
=235*54.3-135*54.3-12.1
=(235-135)*54.3-12.1
=100**54.3-12.1
=5430-12.1
=5417.9
235*12.1+235*42.2-135*54.3
=235*(12.1+42.2)-135*54.3
=54.3*(235-135)
=5430
我是最先作答的哦,不明白欢迎追问.
举一反三
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
最新试题
热门考点